Works consulted:
Carragee EJ, Hannibal M (2004). Diagnostic evaluation of low back pain. Orthopedic Clinics of North America, 35(2004): 7–16.
Datta D, et al. (2005). Low back pain. In ED Harris Jr et al., eds., Kelley's Textbook of Rheumatology, 7th ed., vol. 1, pp. 588–600. Philadelphia: Elsevier Saunders.
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